The effect of gurney flap on flow characteristics of vertical axis wind turbine

Syawitri, Taurista Perdana; Yao, Yu Feng; Yao, Jun; Chandra, Budi

Abstract

Recently, the Gurney Flap (GF) has been used to improve the performance of Horizontal Axis Wind Turbine (HAWT) by enhancing its lift coefficient. Compared to HAWT, research on GF application for Vertical Axis Wind Turbine (VAWT) is very limited. Moreover, most works studied a GF geometry attached to the trailing edge of a stationary airfoil, without considering the rotating effect experienced by VAWT. For this reason, a three-straight-bladed VAWT rotating blade with GF is studied by transient RANS simulation together with a stress-blended eddy simulation (SBES) turbulence model to investigate the GF height effect and the flow characteristics near the blade trailing edge. Results have shown that by introducing the blade rotating, an optimum GF height is found to be 3% of the blade chord, slightly higher than 2% chord in a stationary airfoil case. In addition, the presence of GF can delay deep stall of VAWT blades, thus eliminating negative instantaneous moment coefficient and improving the turbine performance.

• Journal Article Type: Article
• Acceptance Date: Dec 1, 2019
• Online Publication Date: Jun 1, 2020
• Publication Date: Jun 30, 2020
• Deposit Date: Apr 17, 2021
• Publicly Available Date: Jun 2, 2021
• Journal: International Journal of Modern Physics B
• Print ISSN: 0217-9792
• Electronic ISSN: 1793-6578
• Publisher: World Scientific Publishing
• Peer Reviewed: Peer Reviewed
• Volume: 34
• Issue: 14n16
• Article Number: 2040107
• DOI: https://doi.org/10.1142/S0217979220401074
• Keywords: Statistical and Nonlinear Physics; Condensed Matter Physics
• Public URL: https://uwe-repository.worktribe.com/output/7263363
• Related Public URLs: https://eprints.lincoln.ac.uk/id/eprint/41106/